did ryan add to the romney momentum or did biden help put obama back on track? the pollsters go to work to figure it out while voters digest the second of four debates. i'm steve handelsman, nbc news. back to you. >> steve, thanks. >>> president obama and romney will have their second debate tuesday in long island, new york. andrea mitchell led the truth squad with a fact check. she started with the deadly september 11th attack in benghazi. paul ryan accusing them of protecting u.s. personnel. >> what we should not be doing is rejecting claims for calls for more security in barracks and marines. we need marines in benghazi when the ambassador says we need them. the requests were not honored. >> biden called the deaths a tragedy. the obama administration did not know they had been asking for more security help. >> we weren't told they wanted more security. we did not know they wanted more security. by the way, at the time, we were told exactly, we said exactly what the intelligence community told us that they knew. that was the assessment. >> there was an assessm